Added appveyor python tests

dlib/appveyor/python.yml

+
+environment:
+  matrix:
+    - PYTHON: "C:\\Python27"
+      PYTHON_VERSION: "2.7.x"
+      PYTHON_ARCH: "32"
+
+    - PYTHON: "C:\\Python27-x64"
+      PYTHON_VERSION: "2.7.x"
+      PYTHON_ARCH: "64"
+
+    - PYTHON: "C:\\Python33"
+      PYTHON_VERSION: "3.3.x"
+      PYTHON_ARCH: "32"
+
+    - PYTHON: "C:\\Python33-x64"
+      PYTHON_VERSION: "3.3.x"
+      PYTHON_ARCH: "64"
+
+    - PYTHON: "C:\\Python35"
+      PYTHON_VERSION: "3.5.x"
+      PYTHON_ARCH: "32"
+
+    - PYTHON: "C:\\Python35-x64"
+      PYTHON_VERSION: "3.5.x"
+      PYTHON_ARCH: "64"
+
+
+build_script:
+  - python setup.py build
+
+test_script:
+  - python setup.py test